var xmlHttp
function validguest()
{
	var a = document.frm1;
	if(a.txtname1.value=="") {
		alert("Please enter your name");
		return false;
	}
	

	if(a.txtreview1.value=="") {
		alert("Please enter your message");
		return false;
	}

	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null)
  	{
  		alert ("Your browser does not support AJAX!");
  		return;
  	} 
	var url="chk_captcha.php";
	var security_code_var;
	security_code_var = a.security_code.value;
  	url=url+"?security_code_var="+security_code_var;
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}

function stateChanged() 
{ 

	if (xmlHttp.readyState==4)
	{    
			
			var error=xmlHttp.responseText;
			if(error)
			{
				document.getElementById('error').innerHTML = '<font style="color:#FF0033">'+error+'</font>';
				return false;
			}
			else
			{
				 document.frm1.submit();
			}

	}
}

function GetXmlHttpObject()
{
var xmlHttp=null;
try
  {
  // Firefox, Opera 8.0+, Safari
   xmlHttp=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
     xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
     xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
return xmlHttp;
}